Synchronous generator modeling and frequency control using unscented Kalman filter

Abstract

Various examples are related to synchronous generator modeling with frequency control, which can be achieved using unscented Kalman filtering. In one example, a method includes obtaining operational parameters associated with a generator of a power system; determining parameters of a synchronous generator model with frequency control based at least in part upon the operational parameters associated with the generator; and providing a command to a frequency control of the generator, the command updating one or more parameters of the frequency control. In another example, a system includes a generator controller for a generator of a power system; and a computing device in communication with the generator controller, where the computing device is configured to determine parameters of the synchronous generator model using operational parameters associated with the generator and provide a command updating one or more parameters of a frequency control of the generator controller.

Therefore, at least the following is claimed: 
     
       1. A method, comprising:
 obtaining, by a computing device, operational parameters associated with a generator of a power system; 
 determining, by the computing device, parameters of a synchronous generator model with frequency control based at least in part upon the operational parameters associated with the generator, where the determined parameters of the synchronous generator model are determined using unscented Kalman filtering; and 
 providing, by the computing device, a command to a frequency control of the generator, the command updating one or more parameters of the frequency control based upon the determined parameters of the synchronous generator model. 
 
     
     
       2. The method of  claim 1 , wherein the synchronous generator model with frequency control comprises a primary frequency control loop and a secondary frequency control loop. 
     
     
       3. The method of  claim 2 , wherein the primary frequency control loop comprises a droop control and the secondary frequency control loop comprises an integrator gain (K i ) that adjusts reference power to maintain generator frequency at a nominal value. 
     
     
       4. The method of  claim 3 , wherein the determined parameters of the synchronous generator model comprise the integrator gain (K i ). 
     
     
       5. The method of  claim 3 , wherein the determined parameters of the synchronous generator model comprise droop regulation (R) of the droop control. 
     
     
       6. The method of  claim 1 , wherein the operational parameters are measured by a phasor measurement unit (PMU) associated with the generator. 
     
     
       7. The method of  claim 6 , wherein the PMU measures the operational parameters at a distribution bus associated with the generator. 
     
     
       8. The method of  claim 6 , wherein the operational parameters comprise voltage magnitude (V g ) and active power (P g ). 
     
     
       9. The method of  claim 8 , wherein the operational parameters further comprise voltage phase angle (θ), reactive power (Q g ), and frequency (f). 
     
     
       10. A system, comprising:
 a generator controller for a generator of a power system; and 
 a computing device in communication with the generator controller, the computing device comprising a processor and memory storing a synchronous generator control application, where execution of the synchronous generator control application causes the computing device to:
 determine parameters of a synchronous generator model with frequency control based at least in part upon the operational parameters associated with the generator, where the determined parameters of the synchronous generator model are determined using unscented Kalman filtering; and 
 provide a command to the generator controller, the command updating one or more parameters of a frequency control of the generator controller based upon the determined parameters of the synchronous generator model. 
 
 
     
     
       11. The system of  claim 10 , wherein the operational parameters are received by the computing device from one or more distribution monitoring device associated with the generator. 
     
     
       12. The system of  claim 11 , wherein the one or more distribution monitoring device is in communication with the computing device via a network. 
     
     
       13. The system of  claim 10 , wherein the one or more distribution monitoring device comprises a phasor measurement unit (PMU) that measures at least a portion of the operational parameters at a distribution bus associated with the generator. 
     
     
       14. The system of  claim 10 , wherein the operational parameters comprise voltage magnitude (V g ) and active power (P g ) of the generator. 
     
     
       15. The system of  claim 14 , wherein the operational parameters further comprise voltage phase angle (θ), reactive power (Q g ), and frequency (f) of the generator. 
     
     
       16. The system of  claim 10 , wherein the synchronous generator model with frequency control comprises a primary frequency control loop and a secondary frequency control loop. 
     
     
       17. The system of  claim 16 , wherein the primary frequency control loop comprises a droop control and the secondary frequency control loop comprises an integrator gain (K i ) that adjusts reference power to maintain generator frequency at a nominal value. 
     
     
       18. The system of  claim 17 , wherein the determined parameters of the synchronous generator model comprise droop regulation (R) of the droop control.